Topaz (18.30 Carat )
17.55 x 12.99 mm
Stone Type : | Topaz |
Stone Shape : | Emerald |
Stone Weight : | 18.30 carat |
Length X Width : | 17.55 x 12.99 mm |
Length / Width Ratio : | 1.35 |
Approx Face-up Area : | 211.98 mm² |
Approx Volume : | 1,036.84 mm³ |
How many Colors Available for Topaz ?
White , Light Red , Red , Dark Red , Orangey Red , Light Orange , Orange , Light Brown , Brown , Dark Brown , Light Yellow , Yellow , Light Yellowish Green , Yellowish Green , Dark Yellowish Green , Light Green , Green , Dark Green , Light Bluish Green , Bluish Green , Dark Bluish Green , Light Blue , Blue , Dark Blue , Light Violet , Violet , Dark Violet , Light Purple , Purple , Dark Purple , Light Grey , Grey ,
Topaz is a gemstone of many colors. It’s commonly found colorless (white) and then treated to achieve desired colors. Blue Topaz is the most common and popular color variety.
Name of Stone : | Topaz |
Mineral : | Topaz |
Shape : | Emerald |
Chemical Formula : | Al2SiO4(F,OH)2 |
Crystal Structure : | Orthorhombic |
Hardness : | 8 |
Specific Gravity : | 3.53 |
Carat weight : | 18.30 carat |
Gram weight : | 3.660 gm |
Ounces weight : | 0.1291 ounces |
Length : | 17.55 mm |
Width : | 12.99 mm |
Length / Width Ratio : | 1.35 |
Average diameter : | 15.27 mm |
Approx Face-up Area : | 211.98 mm² |
Approx Volume : | 1,036.84 mm³ |
Refractive Index : | 1.610 - 1.638 |
Cleavage : | 1,3 - basal |
Luster : | Vitreous |
Birefringence : | 0.014 |
Wearability : | Very good |
Birthstone : | Topaz is a birthstone for the month of December |
Before purchasing a diamond, one should make sure it looks its weight. It's important to understand that carat weight does not equal face-up size.
Two diamonds of exactly the same weight (and shape) can vary quite considerably in face-up size. This depends on the proportions of the cut (e.g., deep cuts will face up smaller)..
Face-up area is a measure of the size of the diamond when viewed from the top view.
It tells you how big the diamond is at the girdle plane. It's important for a diamond to have sufficient face-up size for its carat weight
Diamond prices vary greatly as they depend on the combination of unique characteristics (4Cs - Cut, Color, Clarity, and Carat). For best value, it's important to choose the combination that will reduce the price without having a negative impact on appearance.
You also need to consider some of the following points as well
- Strong blue fluorescence.
- Fair or Poor symmetry.
- Extremely thin or extremely thick girdle.
- Inclusions visible to the naked eye.
- Diamond Certification.
Blue fluorescence can have a positive, negative, or zero effect on a diamond. Diamonds in the lower color range (H or lower) can benefit from it, as it can make them look whiter, more colorless. On the other hand, strong fluorescence can cause a stone (especially in the higher color range D-G) to appear hazy or milky under certain light conditions. One of the biggest benefits of fluorescent diamonds is that they generally cost less.
Blue fluorescence can be found in 35% of naturally mined diamonds and it makes the stone glow under UV light. Outside of UV lighting environments, there are no visual differences between fluorescent and non-fluorescent diamonds.
However, there exists a big difference in pricing between these diamonds. In the industry, diamonds with fluorescence are usually traded at a 10-15% discount and can go as high as 25% for higher colored diamonds.
GIA grades fluorescence as None, Faint, Medium, Strong, and Very Strong.
There are Many Laboratory Available which provides certification for Gemstones.
- GIA - Gemological Institute of America
- AGS - American Gemological Society
- HRD - The Hoge Raad voor Diamant
- IGI - International Gemological Institute
- EGL - European Gemological Laboratories
- GSI - Gemological Science International
*Different certification labs give different results
Piecut Diamonds are set of small Diamonds, which are cut & polished with Precised Measurements to look like a Single Solitaire diamond which can save 80% to 85% from Solitaire Single Piece Price.
Shapes of Pie Cut Diamonds.
- 9 Pcs Emerald
- 9 Pcs Round
- 4 Pcs Round
- 3 Pcs Heart
- 4 Pcs Oval
- 4 Pcs Pear
- 4 Pcs Marquise
- 5 Pcs Star
Click here for More Information
4.90 ct - Emerald - Topaz
6.70 ct - Emerald - Topaz
3.10 ct - Emerald - Topaz
18.90 ct - Emerald - Topaz
10.20 ct - Emerald - Topaz
11.40 ct - Emerald - Topaz
22.90 ct - Emerald - Topaz
29.50 ct - Emerald - Topaz
23.70 ct - Emerald - Topaz
37.90 ct - Emerald - Topaz
34.00 ct - Emerald - Topaz
36.90 ct - Emerald - Topaz
6.70 ct - Emerald - Topaz
3.10 ct - Emerald - Topaz
18.90 ct - Emerald - Topaz
10.20 ct - Emerald - Topaz
11.40 ct - Emerald - Topaz
22.90 ct - Emerald - Topaz
29.50 ct - Emerald - Topaz
23.70 ct - Emerald - Topaz
37.90 ct - Emerald - Topaz
34.00 ct - Emerald - Topaz
36.90 ct - Emerald - Topaz
2.60 ct - Aquamarine - Cushion
4.70 ct - Aquamarine - Oval
8.20 ct - Hiddenite - Baguette
7.50 ct - Fluorite - Cushion
2.60 ct - Benitoite - Pear
6.10 ct - Spinel - Pear
13.10 ct - Diopside - Trillion
13.20 ct - Hiddenite - Trillion
12.20 ct - Kunzite - Trillion
13.20 ct - Ruby - Pear
16.00 ct - Diamond - Princess
18.10 ct - Benitoite - Pear
29.70 ct - Fluorite - Baguette
29.30 ct - Tanzanite - Oval
24.50 ct - Sapphire - Princess
21.30 ct - Andesine - Round
29.80 ct - Diopside - Trillion
25.90 ct - Diamond - Round
40.00 ct - Morganite - Round
31.70 ct - Tanzanite - Oval
39.80 ct - Diaspore - Pear
33.60 ct - Benitoite - Cushion
36.30 ct - Benitoite - Emerald
35.20 ct - Apatite - Marquise
V S
4.70 ct - Aquamarine - Oval
8.20 ct - Hiddenite - Baguette
V S
7.50 ct - Fluorite - Cushion
2.60 ct - Benitoite - Pear
V S
6.10 ct - Spinel - Pear
13.10 ct - Diopside - Trillion
V S
13.20 ct - Hiddenite - Trillion
12.20 ct - Kunzite - Trillion
V S
13.20 ct - Ruby - Pear
16.00 ct - Diamond - Princess
V S
18.10 ct - Benitoite - Pear
29.70 ct - Fluorite - Baguette
V S
29.30 ct - Tanzanite - Oval
24.50 ct - Sapphire - Princess
V S
21.30 ct - Andesine - Round
29.80 ct - Diopside - Trillion
V S
25.90 ct - Diamond - Round
40.00 ct - Morganite - Round
V S
31.70 ct - Tanzanite - Oval
39.80 ct - Diaspore - Pear
V S
33.60 ct - Benitoite - Cushion
36.30 ct - Benitoite - Emerald
V S
35.20 ct - Apatite - Marquise
10.00 ct - Oval- Diamond
8.10 ct - Cushion- Diamond
1.50 ct - Princess- Diamond
0.60 ct - Trillion- Diamond
7.10 ct - Trillion- Diamond
6.00 ct - Round- Diamond
13.40 ct - Baguette- Diamond
19.60 ct - Baguette- Diamond
16.40 ct - Marquise- Diamond
19.40 ct - Trillion- Diamond
16.10 ct - Emerald- Diamond
16.80 ct - Round- Diamond
27.50 ct - Trillion- Diamond
28.80 ct - Oval- Diamond
25.00 ct - Oval- Diamond
20.20 ct - Oval- Diamond
27.00 ct - Round- Diamond
23.60 ct - Round- Diamond
36.40 ct - Pear- Diamond
33.10 ct - Pear- Diamond
39.70 ct - Pear- Diamond
35.50 ct - Baguette- Diamond
39.20 ct - Princess- Diamond
37.90 ct - Emerald- Diamond
V S
8.10 ct - Cushion- Diamond
1.50 ct - Princess- Diamond
V S
0.60 ct - Trillion- Diamond
7.10 ct - Trillion- Diamond
V S
6.00 ct - Round- Diamond
13.40 ct - Baguette- Diamond
V S
19.60 ct - Baguette- Diamond
16.40 ct - Marquise- Diamond
V S
19.40 ct - Trillion- Diamond
16.10 ct - Emerald- Diamond
V S
16.80 ct - Round- Diamond
27.50 ct - Trillion- Diamond
V S
28.80 ct - Oval- Diamond
25.00 ct - Oval- Diamond
V S
20.20 ct - Oval- Diamond
27.00 ct - Round- Diamond
V S
23.60 ct - Round- Diamond
36.40 ct - Pear- Diamond
V S
33.10 ct - Pear- Diamond
39.70 ct - Pear- Diamond
V S
35.50 ct - Baguette- Diamond
39.20 ct - Princess- Diamond
V S
37.90 ct - Emerald- Diamond